https://blog.cetinich.net 2026-03-22T14:39:11.816848+00:00 ABlog https://blog.cetinich.net/content/food/2021-scones/ 2021-12-15T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>These scones take max 30 mins to prep and cook and are very simple and enjoyable.</p> </p>

These scones take max 30 mins to prep and cook and are very simple and enjoyable.

2021-12-15T00:00:00+00:00 https://blog.cetinich.net/content/2021/m5-ink-calculator/ 2021-11-27T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>I added an <a class="reference external" href="http://https://shop.m5stack.com/collections/m5-controllers/products/m5paper-esp32-development-kit-v1-1-960x540-4-7-eink-display-235-ppi">M5 Paper</a> to my collection of dev boards and decided to make a basic calculator to teach my son to count. Since he is only a few months old he mostly uses it as an expensive teething device.</p> </p>

I added an M5 Paper to my collection of dev boards and decided to make a basic calculator to teach my son to count. Since he is only a few months old he mostly uses it as an expensive teething device.

2021-11-27T00:00:00+00:00 https://blog.cetinich.net/content/2021/2021-python-tips/ 2021-10-10T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>Handy tips and notes about Python 30.8 10, 11 and beyond.</p> </p>

Handy tips and notes about Python 30.8 10, 11 and beyond.

2021-10-10T00:00:00+00:00 https://blog.cetinich.net/content/2021/s3-de-morgans-laws-and-iam/ 2021-09-12T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>Before we get into it we need to review how Condition evaluation works:</p> </p>

Before we get into it we need to review how Condition evaluation works:

2021-09-12T00:00:00+00:00 https://blog.cetinich.net/content/2021/2021-trust-on-cloud-s3-aws-threat-model/ 2021-08-29T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>Trust on Cloud have open sourced their AWS S3 threat model, this release is a great tool to make sense of the “shared responsibility model” and what “responsibility” means for AWS customers.</p> </p>

Trust on Cloud have open sourced their AWS S3 threat model, this release is a great tool to make sense of the “shared responsibility model” and what “responsibility” means for AWS customers.

2021-08-29T00:00:00+00:00 https://blog.cetinich.net/content/2021/2021-vpc-icmp/ 2021-07-18T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>In an on premise network it is typical to do some type of topology discovery via the MIB-II SNMP tables of all your network gear and then use ICMP to ping each of the discovered routers or switches respective management interfaces to validate connectivity and contribute to intelligence when parts of the network go dark and speed up root cause analysis.</p> </p>

In an on premise network it is typical to do some type of topology discovery via the MIB-II SNMP tables of all your network gear and then use ICMP to ping each of the discovered routers or switches respective management interfaces to validate connectivity and contribute to intelligence when parts of the network go dark and speed up root cause analysis.

2021-07-18T00:00:00+00:00 https://blog.cetinich.net/content/2021/2021-python-trusted-ca-store/ 2021-01-31T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>The CA trust store is how a TLS client establish trust with the servers offered certificates. Curl uses openssl and Python uses its own store (like Java). The store on my system is located here:</p> </p>

The CA trust store is how a TLS client establish trust with the servers offered certificates. Curl uses openssl and Python uses its own store (like Java). The store on my system is located here:

2021-01-31T00:00:00+00:00 https://blog.cetinich.net/content/2021/amazon-linux-2-on-prem/ 2021-01-10T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>There is no default ec2-user or root password set for the Amazon Linux 2 ova. You must use <a class="reference external" href="https://cloud-init.io/">cloud-init</a> via it’s <a class="reference external" href="https://cloudinit.readthedocs.io/en/latest/topics/datasources/nocloud.html#datasource-nocloud">nocloud</a> datasource</p> </p>

There is no default ec2-user or root password set for the Amazon Linux 2 ova. You must use cloud-init via it’s nocloud datasource

2021-01-10T00:00:00+00:00 https://blog.cetinich.net/content/2023/vpc-securitygroup-limit/ 2021-01-06T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>How to deal with the error: “The maximum number of rules per security group has been reached.”</p> </p>

How to deal with the error: “The maximum number of rules per security group has been reached.”

2021-01-06T00:00:00+00:00 https://blog.cetinich.net/content/2021/aws-api-gateway/ 2021-01-01T00:00:00+00:00 Brent Cetinich <p class="ablog-post-excerpt"><p>How to make a private REST API using AWS API Gateway that is only accessible from inside a VPC.</p> </p>

How to make a private REST API using AWS API Gateway that is only accessible from inside a VPC.

2021-01-01T00:00:00+00:00